CorebootPayloadPkg/Library/ResetSystemLib/ResetSystemLib.c

   1 /** @file
   2   Reset System Library functions for coreboot
   3
   4   Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <PiDxe.h>
  16 #include <Library/BaseLib.h>
  17 #include <Library/DebugLib.h>
  18 #include <Library/IoLib.h>
  19 #include <Library/HobLib.h>
  20
  21 #include <Guid/AcpiBoardInfoGuid.h>
  22
  23 VOID
  24 AcpiPmControl (
  25   UINTN SuspendType
  26   )
  27 {
  28         EFI_HOB_GUID_TYPE  *GuidHob;
  29         ACPI_BOARD_INFO    *pAcpiBoardInfo;
  30         UINTN PmCtrlReg = 0;
  31
  32   ASSERT (SuspendType <= 7);
  33   //
  34         // Find the acpi board information guid hob
  35         //
  36         GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
  37         ASSERT (GuidHob != NULL);
  38   pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob);
  39
  40   PmCtrlReg = (UINTN)pAcpiBoardInfo->PmCtrlRegBase;
  41   IoAndThenOr16 (PmCtrlReg, (UINT16) ~0x3c00, (UINT16) (SuspendType << 10));
  42   IoOr16 (PmCtrlReg, BIT13);
  43   CpuDeadLoop ();
  44 }
  45
  46 /**
  47   Calling this function causes a system-wide reset. This sets
  48   all circuitry within the system to its initial state. This type of reset
  49   is asynchronous to system operation and operates without regard to
  50   cycle boundaries.
  51
  52   System reset should not return, if it returns, it means the system does
  53   not support cold reset.
  54 **/
  55 VOID
  56 EFIAPI
  57 ResetCold (
  58   VOID
  59   )
  60 {
  61   EFI_HOB_GUID_TYPE  *GuidHob;
  62         ACPI_BOARD_INFO    *pAcpiBoardInfo;
  63
  64         //
  65         // Find the acpi board information guid hob
  66         //
  67         GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
  68         ASSERT (GuidHob != NULL);
  69   pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob);
  70
  71   IoWrite8 ((UINTN)pAcpiBoardInfo->ResetRegAddress, pAcpiBoardInfo->ResetValue);
  72   CpuDeadLoop ();
  73 }
  74
  75 /**
  76   Calling this function causes a system-wide initialization. The processors
  77   are set to their initial state, and pending cycles are not corrupted.
  78
  79   System reset should not return, if it returns, it means the system does
  80   not support warm reset.
  81 **/
  82 VOID
  83 EFIAPI
  84 ResetWarm (
  85   VOID
  86   )
  87 {
  88         EFI_HOB_GUID_TYPE  *GuidHob;
  89         ACPI_BOARD_INFO    *pAcpiBoardInfo;
  90
  91         //
  92         // Find the acpi board information guid hob
  93         //
  94         GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
  95         ASSERT (GuidHob != NULL);
  96   pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob);
  97
  98   IoWrite8 ((UINTN)pAcpiBoardInfo->ResetRegAddress, pAcpiBoardInfo->ResetValue);
  99   CpuDeadLoop ();
 100 }
 101
 102 /**
 103   Calling this function causes the system to enter a power state equivalent
 104   to the ACPI G2/S5 or G3 states.
 105
 106   System shutdown should not return, if it returns, it means the system does
 107   not support shut down reset.
 108 **/
 109 VOID
 110 EFIAPI
 111 ResetShutdown (
 112   VOID
 113   )
 114 {
 115   EFI_HOB_GUID_TYPE  *GuidHob;
 116   ACPI_BOARD_INFO    *pAcpiBoardInfo;
 117   UINTN              PmCtrlReg;
 118
 119   //
 120   // Find the acpi board information guid hob
 121   //
 122   GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
 123   ASSERT (GuidHob != NULL);
 124   pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob);
 125
 126   //
 127   // GPE0_EN should be disabled to avoid any GPI waking up the system from S5
 128   //
 129   IoWrite16 ((UINTN)pAcpiBoardInfo->PmGpeEnBase,  0);
 130
 131   //
 132   // Clear Power Button Status
 133   //
 134   IoWrite16((UINTN) pAcpiBoardInfo->PmEvtBase, BIT8);
 135
 136   //
 137   // Transform system into S5 sleep state
 138   //
 139   PmCtrlReg = (UINTN)pAcpiBoardInfo->PmCtrlRegBase;
 140   IoAndThenOr16 (PmCtrlReg, (UINT16) ~0x3c00, (UINT16) (7 << 10));
 141   IoOr16 (PmCtrlReg, BIT13);
 142   CpuDeadLoop ();
 143
 144   ASSERT (FALSE);
 145 }
 146
 147 /**
 148   Calling this function causes the system to enter a power state for capsule
 149   update.
 150
 151   Reset update should not return, if it returns, it means the system does
 152   not support capsule update.
 153
 154 **/
 155 VOID
 156 EFIAPI
 157 EnterS3WithImmediateWake (
 158   VOID
 159   )
 160 {
 161   AcpiPmControl (5);
 162   ASSERT (FALSE);
 163 }